Finding the Fourth Proportional to 76,473.89, 105,534.69 and 42,019.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,473.89 : 105,534.69 = 42,019.34 : x
2. Step 2: Convert to fraction form
   76,473.89/105,534.69 = 42,019.34/x
3. Step 3: Cross multiply
   76,473.89x = 105,534.69 × 42,019.34
4. Step 4: Simplify right side
   76,473.89x = 4,434,498,020.90
5. Step 5: Solve for x
   x = 4,434,498,020.90/76,473.89
6. Step 6: Final answer
   x = 57,987.09